This was great!
The art style and atmosphere are amazing and really worked to draw me into the setting.
The gameplay was also very engaging and hard (in a good way!, i'm terrible at morse code).
If i had any constructive criticism at all, i was not able to find any explicit instruction that you should be doing one letter at a time instead of just doing the whole word at once. Maybe you could have only allowed 5 dots/dashes at a time?
But still, excellent game!